<b>The harrowing story of five men who were sent into a dark, airless, miles-long tunnel, hundreds of feet below the ocean, to do a nearly impossible job—with deadly results</b><br> <b> </b><br> In the 1990s, Boston built a sophisticated waste treatment plant on Deer Island that was poised to show the country how to rebound from environmental ruin. The state had been dumping barely treated sewage into the water for so long that Boston had America’s filthiest harbor, with a layer of “black mayonnaise” coating the seafloor. Fisheries collapsed, wildlife fled, and locals referred to floating tampon applicators as “beach whistles.” But before the dumping could stop, a team of divers had to make a perilous journey to the end of a 10-mile tunnel—devoid of light and air—to complete the construction. Five went in, but not all of them came out. <br> <br> Drawing on hundreds of interviews and thousands of documents, award-winning writer Neil Swidey takes us deep into the lives of the divers, engineers, politicians, lawyers, and investigators involved in the tragedy and its aftermath, creating a taut, action-packed narrative. The climax comes just after the hard-partying DJ Gillis and his friend Billy Juse trade assignments heading into the tunnel, sentencing one diver to death and the other to a trauma-induced drug addiction that eventually lands him in prison. Suspenseful yet humane, <i>Trapped Under the Sea</i> reminds us that behind every bridge, highway, and tunnel—behind the infrastructure that makes modern life possible—lies unsung bravery and extraordinary sacrifice.